Take-off mechanism fob bubbeb mixing mills



S. DIETR1 CH.- TAKE-OFF MECHANISM FOR RUBBER MIXING MILLS.

APPLICATION FILED APR. 4 I913 Patented Jan. 4, 1921.

is SHEETS-SHEET SebaSf/an Diet/7th M mwwo APPLICATION FILED APR. 4.I918.

Patented Jan. 4, 1921. I

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QHIOW e1 DIETRICH.

TAKE-OFF MECHANISM FOR RUBBER MIXING MILLS.

APILICATlQh FILED APTL4 1918. 1,364,183, Patented Jan. 4, 1921.

3 SHEETS-SHEET 3- UNITED STATES] PATENT, I

SEBASTIAN DIETRICH,-,OF CUDAHY,-:WIS COI TSIN.

TAKE-OFF oHaNIsM'roR numam mrxme inns.

Specification of LettersTatent.

Application filed April 4., 1918. 1 Serial 110,226, 26.

To all whom it may concern:

Be it known that I, SEBASTIAN DIETRICH, a citizen of the United States,residing at Cudahy, in the county of Milwaukee, State substantially ofWisconsin, have invented certain'new and useful Improvements in Take-OffMechanism for Rubber-Mixing Mills, of which I declare the following tobe a full, clear, and

exact description. r f

This invention relates to, an automatic take-off mechanism for rubbermixing mills."

Further objects, and objects relating to economies of manufacture anddetails of construction, will definitely appear from the detaileddescription to follow.

I accomplish the objects of my invention by the devices and meansdescribed in the following specification. My invention is clearlydefined and pointedout in the 31p.

pended claims.

A structure constituting a preferred ambodiment of my invention isillustrated in the accompanying drawing, forming a part of thisspecification, in which:

Figure I is a top plan view showing a portion of a rubber mixing millwith a take oif mechanism embodying my invention connected thereto.

Fig. II is a sectional view taken on the line IIII of Fig. I and showingthe takeoff mechanism in side elevation.

Fig. III is a fragmentary, detail, sectional view takensubstantially onthe line IIIe-III of Fig. I.

Fig. IV is an enlarged view of the upper end of Fig. II, the conveyingbelt not being.

shown. 7

Fig. V is a detail, sectional View, taken on the line V V of Fig. III,

and,

ri v1 is a rmgmena1-y, demi1, sectional v ew taken substantially on theline VI-VI of Fig. V. 7

refer to similar parts throughout the several Patented am 1, 1921. 1

In the drawings,similar reference numerals I views, and the sectionalviews are takenloolo ing inthe direction ofthe little arrows at the endsof the section lines.

In rubber mixing mills there are provided,

customarily, a pair of squeeze rolls 11 and 12 which are driven in'opposite directions and suitably'journaled in the mill frame 10. Themgredients of the ,batchfto be mixed are dumped between the squeezerolls and are thoroughly mixed bythe action of the squeeze rolls, asthey carry 'a thin sheet of the mixed stock around between the rolls,

which sheet adheres to the surface of the rolls so 'as'to form asheet'of stock'coating' the squeeze rolls. This sheet of stock is repeatedly removed from the rolls and rolled up into a bundle and dumpedbetween the until the batch isthoroughly mixed and the ried in a sheetadhering to the rolls, g

V Heretofore, it has been the practice for the operator to-manually'sever'a stripfof approximately the desired width'by the use squeezerolls once more'torepeat the process mixed stock is ready to be'removedfrom the 4 rolls of themixing mill on which it is car- I of a knife andfor his assistant to pull the continuous strip from the roll by handinto a suitable container which receives the strip, dusting the stripwith powdered soap stone,

as he does this, in order to prevent portions of the rubber stripadhering to each other. i

The result is that the strip removed varies in width, as the operatordoes not always apply his knife at thesame point to the" roll. Astrip ofthis nature is usually sent from the mixing mills to the tubing millsthrough which it is fed and the variation in width of the stripsometimes causes the tubing millto choke and interferes withits foperation.

- Byimy invention, I have providedan automatic mechanism for removingthis strip from the rolls, such mechanisminsuring a strip ofuniformwidth and at the same time automatically dustingpowdered soap stone onthe strip as it drops into a: container, waiting to receive it. Thismechanism eliminates the necessity for an assistant pin 17, the bar 18carries another laterally' or helper as its operation is entirelyautomatic.

A post 13 projects from the side of the mill framelO and an arm li isprovided with a portion 15 bent back upon itself and embracing the post13. "Bolts. 16 draw the portion 16 toward the arm 14 so as to clamp thearm to the post 13. The arm 1% extends upwardly and laterally from thepost 13 and carries at its upper end a laterally projecting pin or bolt17 on w hich the bar 18 is pivotally mounted. At the end of the bar 18adjacent the squeeze roll 12 it carries the laterally projecting shaft19 on which. the

pulley 20 is journaled. At substantially an equal distancefrom the otherside of the extending shaft 21 on whichthe pulley 22 is journaled. Theshafts 19 and 21 are held in position relative to the bar 18 by means of.the nuts 28 and 23 threadedthereon. An endless conveyer belt 2e runsover the pulleys 20 and 22.

Straps25 are secured to the bar 18 between the pulleys 20 and 22 andextend transversely to the bar. These straps carry at their upper ends,the platform 26 which extends beneath the upper reach of the endlessconveyer belt 24 and is wider than said belt, being provided withupwardly extending guide flanges 27 at each side thereof.

At the extreme upper end of the bar 18 there is carried a, bolt or pin29 on which the bar 30 is pivoted. This bar forms one side member of theframe 31 of abox having a bottom 32 of wire screening. the forwardcorners of the frame 31 has secured thereto a leg 33 which extendsdownwardly below the bottom of said box. A tripper cam 34: is rivetedtoone edge of the flange of pulley 22 by the rivets 35, in position toengage the lower end of the leg 33.

The post 13 is provided with a longitudinally extending keyway 4i and apair of.

knifeholders 36 are mounted on said shaft,

each of said knife holders having a key 45- fitting in said keyway 1dso, as to prevent rotation of the-knife holdersrelative to the post 13.A series ofholes or notches e6-are providedinthe post 13 in positions sothat any one of them may, be engaged by the set screw 37 carried by theknife holder so as to accurately position the knife holder rela,

tive to'the post 13.. Each knife holder is provided with a slot 38 inits upper, part, in which a thin knife 39 is disposed. Said knife has abayonet slot 410, opening, downwardly, in which a pin 4:1, extendingtransveisely of the knife holder 36 aerossthe slot 38, is engaged. Thepoint 42 of the 'knife contacts with the roll 1250 that the cuttingedgeof the knife slits the stock on the-roll. A spring 43 is connected atone end to the post 13 and at the other endito,

One of;

. so as to hold the pulley 20 in contact with the roll 12.

From the description of the parts given above, the operation of thismechanism should be very readily Lmderstood. The squeeze rolls l land 12are positively driven in opposite directions, the direction of rotationbeing indicated by arrows on the variousfigures'of the drawings. Therotation of the roll 12 drives the pulley 20, due to the frictionalengagement between the two, so that the belt 24: is driven, in thedirection indicated by the arrow in; Fig. II. The knife holders 36 arepositioned on the post 13 by means of the set screws 37 so asto bespaced at a pre-determined distance, depending upon the widthv of.-thestrip which the operator desires to take from the stock A. on themixing mill. The point 4:2 of each knife engages the stock A on, theroll12 at a point just above the end ofthe horizontal diameter of said roll:and slits the stock A in parallel slits, forming a strip B; of uniformWidth. This strip B adheres. to the conveyer belt 24 ,and iscanried bysaid belt up over the platform 26; and, thepulley 22 anddrops from thepulley 22' into a container which is provided to receive it. Spring 43holds the pulley 20 under tension against the roll,

As the pulley 22revolves, the trippcr cam 34 strikes theleg 33 onceevery revolution and lifts it,as shown in dotted lines in Fig. IV,allowing it to drop suddenly. This jars the powdered soap stonecontained in the box 31 and dusts some of itthrough the screening 32forming the bottom of the box upon the strip of rubber B which is beingfed over the belt 2.4. VVhenthemechanism is not in use, the knives andknife holders can be removed by releasing the set screws 37 and;sliding, the knives laterally on the post 13. The bar 18 canthenbeswungon its pivot so as to carry the pulley 2011pwardly away. fromthe. roll12 and the mechanism can be .heldfinthis position or it can; be entirelyremoved from the post 13 by releasing theboltslG which. clamp the arm14:. to the post. 4

It willbe observedzthat this mechanism is fixed rel'ativeto. the squeezerolls. and; in order to provide a continuous feed of; the stock throughthis take-off mechanism, the operator continuously removes portions ofthe rubber stock from other parts of the squeeze rolls andv dumps thembetween the squeeze rolls in line withathe-knives so that a sheet ofstock is continuouslyformed on.

shown and described, is susceptible of coni said mill in parallel lines;automatic means for taking off the strip of stock so formed;

and automatically operable means for.dust-' ing a suitable powder onsaid strip.

2. The combination with .a rubber mixing mill, of means for slitting thestock on said mill in parallel lines; and take-off mechanism contactingwith one of the rolls, and automatically operable thereby to take offthe strip of stock so formed.

3. The combination with a rubber mixing mill, of means for slitting thestock on said mill in parallel lines; means driven by said mill, andautomatically operable to take ofi the strip of stock so formed; andautomatic means for dusting a suitable powder on said strip. Y

4. The combination witha rubber mixing mill, comprising a pair ofsqueeze rolls oppositely driven; of means for slitting the stock on oneof said rolls in parallel lines; and an automatic take-01f mechanism,including a pulley contacting with and driven by one of said rolls andoperable to automatically take off the strip of stock formed by saidslits.

5. The combination with a rubber mixing mill including a pair ofpositively driven squeeze rolls; of means for slitting the stock on oneof said rolls in parallel lines; automatic take-off mechanism, includinga pulley contacting with and driven by one of said rolls, said take-offmechanism being operable to remove the strip of stock formed by saidslits, and automatic means operable to dust the strip of stock so formedwith a suitable powder.

6. The combination with a rubber mixing mill; including a mill frame,and a pair of positively driven squeeze rolls; of a support carried bysaid mill frame; a frame member carried by said support; a pulleyjournaled at one end of said frame member and contacting with one ofsaid squeeze rolls a pulley journaled at the opposite end of said framemember; an endless belt passing around said pulleys and between thefirst-mentioned pulley and the squeeze roll; and means for slitting thestock on said squeeze roll in parallel lines.

7. The combination with a rubber mixing mill, including a mill frame anda pair of positively driven squeeze rolls; of a. frame member supportedfrom said mill journaled in one end ofsaid frame; apulley frame memberand contacting with one of i said squeeze rolls {a pulley j ournaled onthe 7 other end of said frame member; an endless conveyer belt passingover said pulleys and between'said first mentioned pulley and thesqueeze roll; means for slitting the stockon said roll in parallellines; and (automatic means for dusting a suitable powder on the stripof ,stock'sof formed. r f p i 8. The combination with a rubbermixingmill, including a pair of positively driven squeeze rolls and amill frame; of a support extending from said'mill frame; a

pair of knives carried by said support and operable 'to slit the stockonzone-of said squeeze rolls in parallel lines'to forma strip of stock;and a take-off mechanism includingv a pulley contacting with and drivenby said squeeze roll and automatically operable i to remove the strip soformed from the roll 9. The combination witha rubber mixing mill,including a pair of positively driven squeeze rolls and a mill-frame;'.of a support 'extendlng from said mill frame; a pair of knivescarried by said support and-operable to slit the stock on one of saidsqueeze rolls in parallel lines to form a strip of stock; a

take-off mechanism driven by said squeeze roll and automaticallyoperable to remove the strip soformed from the roll; and autowith asuitable powder. 7 10; The combination with a rubber m1);-

matic means for dusting the stripso formed ing milhincluding a millframe and a pair of positively driven squeeze rolls; of a support extendng from said mlll frame; a pair of knives carried by said support andoper- T able to slit the stock on one of said'squeeze rolls in parallellines to form a strip of stocka frame member carriedby said supportabove said knlves; a pulley ournaled in one end of said frame member andconber; and an endless conveyor belt passing around said pulleys andbetween said first mentioned pulley and the'squeeze roll, and i operableto remove said strip of stock from the squeeze roll tosaid belt. I

11. The combination with a rubbermixing mill including a mill frame anda pair of positively driven squeeze rolls; of a support extending fromsaid mill frame; a pair of knives carried by said support and operableto slit the stock on one of said squeeze port above said knives; apulley journaled in one end of said frame member and contact ing withsaid squeeze roll; a pulley journaled at'the other end of said framemember; an endless conveyer belt passing around said pulleys and betweensaid first menrolls in parallel lines to form a strip of i I stock; aframe member carried by said suptioned pulley and the squeeze roll, andoperable to remove said strip of stock from the squeeze roll to saidbelt; and automatic means for dusting a suitable powder on said strip ofstock.

12. The combination with a rubber mixing mill, including a mill frameand a pair of positively driven squeeze rolls; of a sup port extendingfrom said mill frame; a pair of knives carried by said support andengaging one of said squeeze rolls to slit the stock thereon in parallellines to form a strip of stock; a frame membercarried by said supportabove said knives; a pair of pulleys journaled on said fra-me'member;one of said pulleys contacting with said squeeze roll; anv endlessconveyer belt passing over said pulleys and between one of them and theadjacent squeeze roll; and automatic means operable by the other of saidpulleys to dust a, suitable powder on the strip of stock.

13. The combination with a rubber mi};- ing mill, including a mill frameand a pair of positively driven squeeze rolls; of a supportextendin'gfrom said mill frame; a pair of knives carried by said support andcontacting with one of said squeeze rolls to slit the stockthereon inparallel lines to form a strip of stock; a frame member carried by saidsupport above said knives; a pair of pulleys journaled on said framemember; one of said pulleys contacting with said squeeze roll, anendless conveyer belt passing around said pulleys and between one ofthem and the adjacent squeeze roll; a box pivotally mounted on saidframe member and provided with a perforate bottom; and

automatic means for rocking said box on its pivot.

14. The combination with a rubber mixing mill, including a mill frameand a pair of positively driven squeeze rolls; of a support extendingfrom said mill frame; means for slitting the stock on one of saidsqueeze rolls to form a strip of'stock; a frame member carried by saidsupport; pulleys journaled on said frame member, one of said pulleyscontacting with said'squeeze roll; an endless conveyer belt passingaround said pulleys and between one of them and the adjacent squeezeroll; a box pivotally mounted on said frame member and provided with aperforate bottom; a leg depending from saidbox; anda trippercam'mounted'on one of said pulleys and engaging said leg.

15. The combination with a-rubber mixing mill, including a mill frameand a pair of positively driven squeeze rolls; of a suppo'rtlextendingfrom said mill frame; means for slittingth'e stock onone' of saidsqueeze rolls in parallel" lines to form a strip of stock; a framemember carried by said'support; a pair of pulleys journal'ed on saidframe member, one of said pulleys contacting withsaid squeeze roll, anendless-conveyer belt passing around said pulleys and between one ofthem and the adjacent squeeze roll; and a platformprovided with marginalflanges disposed beneath the upper reach of said conveyer belt betweensaid pulleys.

In testimony whereof, I aiiix my signature.

SEBASTIAN DI'ETRIGH'.

